Effect of surface roughness of MgO substrate on size distribution of inclusions

Lee, Y. S.; Jung, Seung Boo; Min, Dong Joon

doi:10.1179/1743281213y.0000000120

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…Spinel formation could only be attributed to the interaction between endogenous Al 2 O 3 and exogenous [Mg] released by refractory linings (MgO ≥ 70 wt%, Al 2 O 3 ≤ 30 wt%). [ 29–31 ] In the Mg‐treated HM steel, MgO and MgS were primarily formed inclusions as shown in Figure 5b. In addition, the average composition of inclusions shifted from MnS toward MgS.…”

Section: Resultsmentioning

confidence: 99%

Effect of Mg Treatment on the Evolution of Inclusions in M50 Aerospace Bearing Steel Under Different S/O Ratio Conditions

Wang,

Jiang,

Jiang

et al. 2024

steel research int.

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Herein, laboratory experiments and thermodynamic calculations are conducted to study the influence of Mg treatment on the inclusion behavior of M50 aerospace bearing steels under different S/O mass ratios (mass ratios of S content to O content). The type, morphology, and distribution of inclusions in ingots with and without Mg treatment are characterized by the scanning electron microscope, energy‐dispersive X‐Ray spectroscopy, and ASPEX automated inclusions analysis system. In addition, the phase distributions of inclusions in M50 steels are simulated using FactSage software to clarify the mechanism of inclusion evolution during the smelting and solidification processes. For both high and low S/O mass ratio steels, the primary spinel and Al2O3 inclusions can be completely modified into MgO inclusions and MnS can be partially transformed into MgS inclusions by Mg treatment. After Mg treatment, the size and number density of inclusions show a noticeable increase in high S/O mass ratio steel resulted from a mass of MgS formation but a slight decrease in low S/O mass ratio steel due to the MgO removal by floatation. Based on the present study, an optimal S/O mass ratio for tight control of detrimental inclusions in Mg‐treated M50 steels is obtained.

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Section: Resultsmentioning

confidence: 99%

Effect of Mg Treatment on the Evolution of Inclusions in M50 Aerospace Bearing Steel Under Different S/O Ratio Conditions

Wang,

Jiang,

Jiang

et al. 2024

steel research int.

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“…When moving from the refractory side to Fe, the proportion of Al2O3 gradually decreased, which is similar to the results of the reacted layer formed between Al2O3-C refractory and liquid Fe. 16) In order to observe the Table 2. Chemical compositions of Al2O3-SiO2-C refractory before and after decarburization (mass%).…”

Section: Effect Of Refractory Materials On the Interfacialmentioning

confidence: 99%

Interfacial Reaction between Al2O3–SiO2–C Refractory and Al/Ti-Killed Steels

2014

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In the current investigation, the thin film method was employed to clarify the formation mechanism of the oxide layers at the interface between the Al2O3-SiO2-C refractory and liquid Fe. A reacted layer was formed in such a way that initially FeO-enriched liquid layers are widely distributed on the Fe surface and FeO and SiO2 in the liquid layer are reduced by Al in liquid Fe to develop solid Al2O3-enriched layer of inclusions. Some inclusions in liquid Fe might be produced by the remaining oxygen in Ar gas being supplied through the nozzle to prevent the adherence of inclusions onto it. The oxide layers at the interface estimated by thermodynamic calculation are in good accordance with the experimental results of the reaction between Al2O3-SiO2-C refractory and Al-killed/Al-Ti-killed steels previously reported.

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“…Ni coarsening is believed to be a capillary driven phenomenon [14]. According to the Gibbs-Thompson effect, materials with high curvature have a higher chemical potential than materials of lower curvature [15]. The properties of interfacial diffusion dictate that materials of high chemical potential are attracted to areas of low chemical potential.…”

Section: Introductionmentioning

confidence: 99%

Phase Field Simulation Coupling Microstructural Evolution and Crack Propagation during Performance Degradation of Solid Oxide Fuel Cells

Abdullah

Liu

2015

ECS Trans.

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Microstructural evolution and crack propagation occur in Solid Oxide Fuel Cells (SOFCs) at elevated operation temperatures (above 600°C). These phenomena cause performance degradation in electrochemical activity and compromise of structural integrity of SOFCs as well. Nickel (Ni) coarsening of Ni-yttria stabilized zirconia (YSZ) in the anode of a SOFC is believed to lead to microstructural evolution. Meanwhile, stress concentration and pore aggregation causes crack propagation in the anode. Both microstructural evolution and crack propagation have a significant impact on the performance of SOFCs. Based on theories of diffuse-interface and Ginzburg-Landau, an integrated phase field model is developed to couple electrode microstructural evolution and crack propagation in the anode. Interfacial diffusion of the phases is observed to lead to Ni particle coarsening. The triple phase boundary (TPB) is found to be affected by microstructural evolution and the crack propagation.

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Effect of surface roughness of MgO substrate on size distribution of inclusions

Cited by 7 publications

References 12 publications

Effect of Mg Treatment on the Evolution of Inclusions in M50 Aerospace Bearing Steel Under Different S/O Ratio Conditions

Effect of Mg Treatment on the Evolution of Inclusions in M50 Aerospace Bearing Steel Under Different S/O Ratio Conditions

Interfacial Reaction between Al2O3–SiO2–C Refractory and Al/Ti-Killed Steels

Phase Field Simulation Coupling Microstructural Evolution and Crack Propagation during Performance Degradation of Solid Oxide Fuel Cells

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